外研版（2019）选择性必修第二册 Unit5 A delicate world 高频词汇课件（二）（共21张PPT)

(共21张PPT)
Unit 5
高频词汇学习(二)
设计说明
本课件依据新教材和新课标的要求，将中英文中思维差异大、高考出现频率高、词义较多、用法灵活的词汇进行了汇总和精讲。
特点创新趣味性导入、追本溯源记单词、多重维度复现单词、遗忘曲线精准练单词、深度学习记忆单词
模块每个词的呈现同中有异，包含导入、详情和练习三个主要模块。具体分为情境导入、词根溯源、语义网络图、精准释义、常见搭配、词块例句、高考链接、学后练习等方面
Unit5 高频词汇一览
owe v.
decrease n.&v.
owe
导入
详情
练习
精准释义
owe v.
词汇拓展
高考链接
词块例句
词源
语义网络图
导入
owe [ ] v.
“I owe to my angel mother”是什么意思？
词源
owe的词源义是“to have, own”，引申为“用拥有的去支付或偿还”。其基本义为“应偿还”。
语义网络图
应偿还
owe
（基本义）
“应偿还”金钱
应该把……归功于
“应偿还”事情发生的原因
“应偿还”解释或歉意等
欠（债）
应给予
精准释义
vt.欠(债),欠(账、钱、人情等)
vt.应给予
vt.应该把..归功于
owe sb. sth. /owe sth. to sb. 欠某人某物
owe sth. to sb. /sth. 把某事归功于某人或某事
owe it to sb. that/to do...把……归功于某人
She still owes her father 3 000.她还欠她父亲3 000英镑。＝ She still owes 3 000 to her father.
How much do I owe you for the groceries 买这些杂货我得给你多少钱？
You owe me a favour!你还欠我个人情哪！
He owes his success to hard work.他的成功是靠勤奋工作。
词块例句
owe
owing to因为，由于
He was out of work owing to a physical injury 他因为受伤而失业了。
not used in the progressive tenses 不用于进行时)
owe [ ] vt.欠(情);欠(账);欠(债);归功于;归因于;起源于
own [ n]v.拥有;有(尤指买来的东西);承认
adj./pron.(用于强调)自己的;本人的;自己做的;为自己的
词汇拓展
In addition, the use of oxen in ceremonies and the thanks people owe to oxen help to develop various traditional customs, which becomes an important part of the folk culture of the Chinese nation.(高考 安徽卷 2009 阅读)
"How much do I owe you “(高考 北京卷 2008 阅读)
该词在历年高考真题中出现10次
高考链接
一、完成句子。
1. He ________________ (把成功归因于) his hard work.他把他的成功归功于他的努力。
2. Was it ________ (由于)bad weather that they had to change the schedule of leaving？是因为恶劣的天气他们才不得不改变了离开的日程吗？
二、单句改错。
1. I owe to you that we have made such a great breakthrough.
练习
owed his success to
owing to
∧
it
导入
详情
练习
词源
精准释义
词汇拓展
高考链接
词块例句
decrease
decrease n.&v.
decrease [d 'kri s] v. & n.
导入
高考链接
根据汉语，写出单词的正确形式。
The number of cities producing CO beyond the standard has been __________（减少）from 40 to 9.（2014 全国）
decreased
reduced
decrease是正式用语
词源
词源
构词：de- (down) + crease (to grow) → 向下长 → 减少
精准释义
vt & vi（使）减少；（使）减小
decrease...to 下降到……
decrease...by 下降了……
The number of new students decreased from 210 to 160 this year.
The price of wheat decreased by 15% last year.
There has been a decrease in imports.
There has been a decrease of nearly 6% in the number of visitors to the museum.
词块例句
decrease
词汇拓展
记忆技巧：de 向下 + creas 增长；产生；做 + e → 负增加 → 减少
近义词：decline，reduce， drop
反义词：increase
B. Negative self-talk damages self-confidence and decreases self-respect.(高考 北京卷 2020 阅读)
This switch has decreased 66 (pollute) in the country's major lakes and reservoirs and made drinking water safer for people.(高考 全国卷II 2018 语法填空)
So even if emissions were to begin decrease today, we would still face the challenge of adapting to climate.(高考 江苏卷 2017 阅读)
该词在历年高考真题中出现21次
高考链接
练习
在空白处填入1个适当的单词或括号内单词的正确形式。
1. The new treatment led to a huge decrease __________ the number of deaths.
2. While Spain as a whole is heating up quickly, temperatures near the greenhouses have __________ (decrease).（2017 江苏）
3. They decreased the size of the group __________ 25 __________ 15.
to
in
decreased
from
to
练习
4. Bank base rates have fallen from 10 per cent to 6 per cent — a decrease __________ 40 per cent.
5. Campus talks have decreased __________ 10 percent this year.
of
by